Grinding or polishing cone.



PATBNTED AUG. 11, 1903.

L. G. KOENIG.

GRINDING 0R POLISHING GONE.

APPLICATION FILED NOV. 29. 1902.

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{PATENT Patented August 11, 1903.

FFICEQ LEQNARD G. KOENIG, OF HAZLETON, PENNSYLVANIA.

i GRINDING OR POLISHING CONE.

SPECIFICATION forming part of Letters Patent No. 736,114, dated August 11, 1903. Applioatien filed November 29, 1902- Serial No. 133,182- (No model.)

To wZZ whom it may concern:

Be it known that I, LEONARD G. KOENIG, a citizen of the United States, residing at Hazleton, in'the county of Luzerne and State or 5 Pennsylvania, have invented certain new and useful Improvements in Grinding or Polishing Cones; and I do declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled rain the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention has relation to grinding or polishing cones; and it consists in the novel constructionand arrangement of its parts, as hereinafter shown and described.

The object of the invention is to provide a cone consisting of a strip of abrading material, said strip having a straight edge and the opposite edge having the straight portion parallel to the first said edge and the remaining portion of the second said edge being oblique, the strip adapted to be wound on a suitable core, and when so wound the portion of the strip having parallel edges will form a cylindrical portion' and the portion of the strip having an oblique edge will regularly project the laminae-of the strip successfully beyond each other to form a conical hollow in a portion of the device and provide a flexible freely-bendable extremity with a substantially inflexible body portion, the edges at one end of the device being flush and being secured together by an adhesive located on the face of the strip, the core consisting of two or more semicylindrical sections internally threaded and being held in place in the interior of the device bya suitable adhesive, the core being made of semicylindrical sections threaded in their interiors for the reception of spindles of different sizes.

In the accompanying drawings,Figure l is a plan view of the strip, showing the side upon which the adhesive is located. -Fig. 2 is a planview of the strip, showing the side upon which the abrading material is located. Fig. 3 is a longitudinal sectional view of the polishing-cone. Fig. 4 is a perspective view of the polishing-cone, and Fig. 5 is an end View of the polishing-cone.

The cone consists of a flexible strip 1, upon .which it is brought to hear.

one side of which is located an abrading material 2. Said strip may be cut from sandpaper, emery-paper, or any other similar material. On the opposite side of the strip from the abrading material is placed the adhesive 3, which may be in form of glue. The strip 1 is providedwith the straight edge 4, and the-opposite edge of said strip has aportion of its length also straight, as at 5, and parallel with the edge 4.. The remaining portion of the opposite edge is oblique, as at 6. The strip is wound upon the core 7, as shown in Fig. 3, and when so wound the interior of the strip is substantially inflexible, or nearly so, owing to the fact that the core 7 adds rigidity, and the end of the strip having parallel edges is wound in two or more thicknesses, the edges at each end being flush, while the portion of the strip having an oblique edge projects regularly and forms a flexible or freely-bendable extremity adapted to conform to the contour of the surface against By placing the adhesive 3 on one of the faces of the strip the coils of the strip may be more securely and rigidly attached to each other without the use of a disk at the flush edge of the strip, and consequently in addition to adding strength and rigidity at the base of the cone a minimum number of parts is used in forming the cone.

The core 7 consists of a series of semicylindrical sections 8, glued in the center of the core of the strip, the said sections 8 being internally screw-threaded, and by reason of the fact that the said cone is made in sections it .may expand to receive spindles of different sizes.

The device is especially adapted to be used upon dentists lathes for polishing or grinding vice will be flexible 0r freely bendable to conpanded without rnptnring the strip to receive 10 form to the contour of the surfaces against between them spindles of various diameters. which it is brought to bear, said strip having In testimony whereof I hereunto attach my an adhesive applied between its faces at one signature in the presence of two witnesses.

5 edge, whereby the coils of the strip are held 1 together at that edge and rigidity added, the I I LEONARD said core consisting of a series of semicylin- Witnesses: drical sections attached directly to the face LORENA PHILLIPS, of the strip, said sections adapted to be ex JOHN WILHELM. 

